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fix incorrect unmatched count calculation

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This could lead to underflow (and crashed in debug builds)
This commit is contained in:
Pascal Kuthe 2023-08-04 08:55:54 +02:00
parent e499e2b601
commit 9670035cdc
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GPG Key ID: D715E8655AE166A6
1 changed files with 4 additions and 6 deletions
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10
src/worker.rs
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@ -36,7 +36,6 @@ pub(crate) struct Woker<T: Sync + Send + 'static> {
notify: Arc<(dyn Fn() + Sync + Send)>,
pub(crate) items: Arc<boxcar::Vec<T>>,
in_flight: Vec<u32>,
unmatched: AtomicU32,
}
impl<T: Sync + Send + 'static> Woker<T> {
@ -78,7 +77,6 @@ impl<T: Sync + Send + 'static> Woker<T> {
notify,
items: Arc::new(boxcar::Vec::with_capacity(2 * 1024, cols)),
in_flight: Vec::with_capacity(64),
unmatched: AtomicU32::new(0),
};
(pool, worker)
}
@ -152,13 +150,11 @@ impl<T: Sync + Send + 'static> Woker<T> {
if cleared {
self.last_snapshot = 0;
*self.unmatched.get_mut() = 0;
self.matches.clear();
}
// TODO: be smarter around reusing past results for rescoring
if self.pattern.cols.iter().all(|pat| pat.is_empty()) {
*self.unmatched.get_mut() = 0;
self.matches.clear();
self.matches
.extend((0..self.last_snapshot).map(|idx| Match { score: 0, idx }));
@ -179,6 +175,7 @@ impl<T: Sync + Send + 'static> Woker<T> {
self.remove_in_flight_matches();
}
let mut unmatched = AtomicU32::new(0);
let matchers = &self.matchers;
let pattern = &self.pattern;
if pattern_status != pattern::Status::Unchanged && !self.matches.is_empty() {
@ -187,6 +184,7 @@ impl<T: Sync + Send + 'static> Woker<T> {
.take_any_while(|_| !self.canceled.load(atomic::Ordering::Relaxed))
.for_each(|match_| {
if match_.idx == u32::MAX {
unmatched.fetch_add(1, atomic::Ordering::Relaxed);
return;
}
// safety: in-flight items are never added to the matches
@ -194,7 +192,7 @@ impl<T: Sync + Send + 'static> Woker<T> {
if let Some(score) = pattern.score(item.matcher_columns, matchers.get()) {
match_.score = score;
} else {
self.unmatched.fetch_add(1, atomic::Ordering::Release);
unmatched.fetch_add(1, atomic::Ordering::Relaxed);
match_.score = 0;
match_.idx = u32::MAX;
}
@ -241,7 +239,7 @@ impl<T: Sync + Send + 'static> Woker<T> {
self.was_canceled = true;
} else {
self.matches
.truncate(self.matches.len() - take(self.unmatched.get_mut()) as usize);
.truncate(self.matches.len() - take(unmatched.get_mut()) as usize);
if self.should_notify.load(atomic::Ordering::Acquire) {
(self.notify)();
}